#!/bin/env bash

echo "\$[]:1+2=$[1+2],1-2=$[1-2],1*2=$[1*2],1/2=$[1/2],1%2=$[1%2]"

echo "\$(()):1+2=$((1+2)),1-2=$((1-2)),1*2=$((1*2)),1/2=$((1/2)),1%2=$((1%2))"

i=2;j=3
let i=i+1;let j=j-1;let m=16/4;let n=5*3;let x=2%3
echo "let i=i+1 look i=i+1 as a parameter: $i,$j,$m,$n,$x"

echo "expr: 1+2=`expr 1 + 2`,1-2=`expr 1 - 2`,1*2=`expr 1 \* 2`,1/2=`expr 1 / 2`,1%2=`expr 1 % 2`"


